I'm thinking of getting the VTech i5867. Does anyone know if it works real good (especially voice quality) with Vonage? Many thanks.

I have the i5857 and am very happy with it.( non answering machine version). Excellent call quality, conversation is loud and clear. Also I haven't experienced any echo on local calls, only a couple of times on international calls. I have tried ATT, Panasonic & Uniden but returned them all. Speaker phone is absolutely great.